Keep the chill away with 5100 Series Horizontal/Vertical Discharge Fan Forced Suspended Unit Heater by TPI. Model F2F5103N constructed using 18 ga. steel cabinet with powder coated finish. This unit has spiral fin steel element with continuously brazed steel finish formed to allow side draw through air flow. These 5100 series heaters are suggested for applications up to 6000 feet. Optional diffusers is also available for down flow (vertical discharge) applications.